/*
 * Copyright (c) 2009, The MilkyTracker Team.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - Neither the name of the <ORGANIZATION> nor the names of its contributors
 *   may be used to endorse or promote products derived from this software
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/*
 *  AudioDriver_COMPENSATE.h
 *  MilkyPlay
 *
 *  Created by Peter Barth on 22.04.06.
 *
 */
#ifndef __AUDIODRIVER_COMPENSATE_H__
#define __AUDIODRIVER_COMPENSATE_H__

#include "AudioDriverBase.h"
#include "MilkyPlayCommon.h"
#include "MasterMixer.h"

class AudioDriver_COMPENSATE : public AudioDriverBase
{
    protected:
        bool deviceHasStarted;
        mp_uint32 sampleCounter;
    public:
        AudioDriver_COMPENSATE () :
            deviceHasStarted(false),
            sampleCounter(0)
        {
        }

        virtual ~AudioDriver_COMPENSATE ()
        {
        }

        virtual mp_uint32 getNumPlayedSamples() const {
            return sampleCounter;
        }

        void fillAudioWithCompensation(char* stream, int length)
        {
            // sanity check
            if (!this->deviceHasStarted)
                return;

            MasterMixer* mixer = this->mixer;

            // Attention: Sample buffer MUST be 16 bit stereo, otherwise this will not work
            this->sampleCounter += length >> 2;
            //mixer->updateSampleCounter(length>>2);

            if (isMixerActive())
                mixer->mixerHandler((mp_sword*)stream);
            else
                memset(stream, 0, length);
        }
};

#endif